Just went ahead and 100%'d all missions to double-check this. I haven't done multiplayer achievements of course but I have done plenty of single player missions... given how the game played out so far and the complete lack of in-game messages concerning this I'm going to go out on a limb and...
Acekard 2i, works fine, eeexcept missions stop unlocking after "Train Us In Your Ways". Plays through, behaves nicely, just doesn't open up a subsequent mission. *scratches head* This is like fifteen missions in.
Anyone got any tips for the middle lower room of the uhh I could use spoiler tags at this point, sheesh... the bit with the nightvision? Never mind I got it, trying to do too much at once. Helpful game behavior begins if I take it one bunk at a time.
I'm making up my own story as it goes along. I've decided that "D99" is a psychogenic drug being added to the water supply by a monarchy of miscreants intent on overthrowing the government.
Regged just to thank this thread - I'm sure there was a hint in the dialogue but I can't understand it, it was driving me nuts. Ring the bell three times in rapid succession, ding-ding-ding, and the puzzle may continue!